Best Of: Exploring Underwater Caves / Character Actor Stephen Root

Diver and photographer Jill Heinerth talks about some of her most dangerous and exhilarating experiences underwater — like getting trapped inside an iceberg in Antarctica. Heinerth also shares how she stays calm when things go wrong: "I take a really deep breath and try and slow my heart, slow my breathing, and then just focus on pragmatic small steps," she says. Her new book is 'Into the Planet.'

Also, film critic Justin Chang reviews 'Brittany Runs a Marathon,' starring Jillian Bell.

And after appearing in nearly 800 TV episodes and 100 films, character actor Stephen Root received his first Emmy nomination for his role as a handler to a hitman in the HBO series 'Barry.' He also talks about his role in 'Office Space.'